Grindstone-lost-muddy Watershed Dam A-23 is an earth dam located in DeKalb County, Missouri, built in 1975. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 530 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Grindstone-lost-muddy Watershed Dam A-23
The primary purpose of Grindstone-lost-muddy Watershed Dam A-23 is grade stabilization. Grade stabilization dams prevent erosion by reducing the slope and velocity of water flowing through a channel. They're commonly used to stop gullies from deepening and to protect downstream land and infrastructure. The dam is owned by Grnstn-ls-mdy Wrsd Sbdis (local government). It impounds the Tr-grindstone Creek near Pattonsburg.
The dam stands 20 feet tall and stretches 530 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 114 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1975, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Missouri |
| County | DeKalb |
| Nearest City | Pattonsburg |
| River/Stream | Tr-grindstone Creek |
| Coordinates | 39.77784, -94.33148 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 530 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 114 acre-ft |
| Max Storage | 114 acre-ft |
| Normal Storage | 37 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 12 sq mi |
| Max Discharge | 287 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | Grnstn-ls-mdy Wrsd Sbdis |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO50088 |
| Federal ID | MO50088 |
| More Info | State Dam Safety Program |